[Roberton3]

UCLA defense, first three games of season: 4.38 yards per play, 326 yards per game
UCLA defense, next two games: 5.27 yards per play, 466 yards per game

At least part of that is a quality-of-competition effect: Arizona and ASU both probably have better offenses than BYU, and certainly have better offenses than the first two teams UCLA played.

[Roberton3]

UCLA defense, first three games of season: 4.38 yards per play, 326 yards per game
UCLA defense, next two games: 5.27 yards per play, 466 yards per game

At least part of that is a quality-of-competition effect: Arizona and ASU both probably have better offenses than BYU, and certainly have better offenses than the first two teams UCLA played.